Chitranna: Broccoli and Green beans soup

Actually I don't have much collections of soups..So trying to prepare different verity soup....A bowl of soup is very health friendly drink,,,that too in winter..wow....what a great drink,,any time ....

Ingredients:
Green beans chopped 1cup
Broccoli chopped 1cup
Sweet corn(optional) 1/2 cup
water around 1/2 ltr
vegetable stock cube 1
salt as per taste
lemon juice 1/2tsp
black pepper powder 1tsp
Finely chopped onion
Olive oil 1tsp

Preparation:
Add all the vegetables in a pan or pressure cooker along with water and cook till they are tender.Then strain out the water in a pan and mash the vegetables along with pepper powder and salt..Once done add to the water which was kept in pan(vegetable water)Keep aside
Heat a pan add oil and chopped onion,,fry till its color changes,then add mashed veggie with water and also lemon juice and stock cube(mash it before adding)...Give a good stir......